Improvement in the manufacture op iron



tt-ital tatr pme yeinen.

DAVIDSTEWAR'L or KiT'rANNING, PENNSYLVANIA.

Letters Patzmt No. 92,667, dated July 13, 1869.

IMPROVEMENTIN THE MANUFACTUREOF IRON'.

The Schedule referred to in these Letters Patent and making part of the same. n

To 4all whom-"ttl may concern Be it known that I, DAVID STEWART, of Kittanning, in the county of Armstrong, and State of Pennsylvania,fhave inventcda new and useful Improvement i in Method and Apparatus for 'lilannfacturing Iron and I do hereby declare that the following is a full, clear, and exact description thereof, vreference being had to the accompanying drawings, and to the letters of reference In the accompanyingdrawings, which form part of,

my specification- Figure l is a vertical section, (when cut through at line y1, iig. 3,) of my improvement iu apparatus for manufacturing concreto blooms.

Figure 2 is a vertical section of the same when cut through at line 'y2 of iig. 3.

Figure 3 is a transverse section, when cut. through at line y of tig. 1. f

In the drawings- A is a metal tube, about forty feet in height, and about twentyfour inches in diameter, and may be made round or square, when viewed in. cross-section.

The upper end of the tube or pipe A is provided with a metal (by preference copper) pipe or tube, B. This tube or pipe is about three feet in length, and arranged concentric to the bore oftubeor pipe A, and

- should correspond in form to the tube or pipe A, 'and thc block C should 'be coated with fire-clay, or' other.

refractory matter.

A receiving-vessel, D, is suspended just above the upper ends ofthe tubes or pipes A and B.

In the bottom ofthe receiving-vessel D, is an openl.

ing, a2. This opening is arranged directly over the block C.

The tube or pipe A is provided with two blast-pipes f, and two chutes e, which sllould be provided with hoppers, as indicated by the dotted lines O.

The position and relation of the blast-pipesf and chutes c to each other, and to the tube orrpipe A, is

clearly shown in ig's. l and 2 of the accompanying drawings.

The point of attachmentof thc blast-pipes f andchutes e tothe tube or pipe A should -bc about six feetup from the lower le'nd of it The bloom or ingot-moulds (1 should be arrangedon trucksras indicated by the dotted lines x, so that they may be readily removed from under, and brought'under and central to the here of the tube or pipe A.

The form and size of the moulds may be adapted to the form and size of bloom'or ingot desired by the manufacturer.A

It is hereinbefore stated that the tube or pipe A should be about forty feet in height, but the height of it lmay bevaried to adapt it to thediiference in the quality of the cast-iron used in manufaotureof the blooms; v

If the cast-iron is easily purified and converted, then the tube or pipe A maybe shorter; but if the castiron is hard to purify and convert,'then the height of 'the tnbe'orpipeA- should be greater` i In practice, it will be found that about forty feet in provement in apparatus for manufacturing concrete blooms will readily be understood from theforegoing description, and by reference tothe accompanying drawings, AI will'therefore proceed to its'operation in the manufacture of. concrete blooms. A

' Having all things constructed and arranged as hereinbefore described, with l the blast-pipes f attached to a fan, blower, or otherblas't-device, I take molten castiron direct from .the ore, or pig-iron remelted, and having elevated it to the. receiving-Vessel .1), the molten cast-iron is poured into it, andA from it runs down through the opening x2, and'falling'on the block C, is

scattered into a great number of very small streams,l

whichstrike against the sides of the short tube or pipe B, and are thereby dividedint spray or globules.

At the moment the molten cast-iron is poured into the vessel D, the bla-st is introduced, through pipes j, into the tube or pipe A, as is also inely'pulverized iron-ore, orA other metallic oxide or oxides, through the chutes e. By thus introducing an active current o f air andlstreams of pulven'zed ore, or other metallic oxide, into the tube or pipe A, the upper portion of 'it will be filled with a moving `column of air, and the lower portionof it will be lled with an active current.

of air, sul-charged with finely-pnliierized iron-ore, or other metallic oxide.

Now the molten cast-iron, being subdivided into with pulver-ized iron-ore, or other metallic oxide, corn- @les of pulverized iron-ore'in it, and each particle or gled together as to form one-homogeneous mass.

when tilled, removed, and another cmptymould brought spray or globules, as hereinbefore stated, will first pass down through the moving column of pure air, which so acts on the spray or globules as to canse them to become intensely heated1 andthe oxygen of the air, combines with thc particles or giobules of molten cast iron, and partially purities and partially converts the particles or globules into wrought-iron, as distinguished from ordinary cast-iron. Y

vThese partially-purified and partially-converted parhielos or globules, in Vtheir intensely heated condition, passing on down through the first portion of the tube 0r pipe A, come in Contact with the air, surchargedv bining witlrthe-oxygen of the air and the fine partiglobule of molten iron becoming enveloped with the pulverized iron-ore, or other metallic oxide, falls down into the bloom or ingot-moulds, and there becomes thoroughly mixed and united with that portion -of the pulverized iron-ore, or other metallic oxide, which has, 'ny reason of its specific gravity, sunk down 'into the moulds, thcrebythrming concrete-blooms, the constituent parts of which consist of partially-purified and partially-converted cast-iron, and-a metallic oxide or oxides, which are so mixed, combined, and commin- 'lhe bloom or ingot-moulds g should be arranged on a truck or trucks,imlicated at x, and provided with a continuous series of moulds, which can be brought directly under the lower end of the tube or pipe A, as shown in tig. l, for the purpose of being filled, and

forward.

bacca' .Ihe truck x, with the moulds, may be made to txavel on a straight or circular railway.

After the blooms are formed in the moulds, and have become suticiently congealed, they are removed from tially converting, and intenselyheating the molteneast-iron while in a subdivided condition, and `then mixing the same with a metallic oxide, wherebya new result is obtained in the manufacture and quality of the bloom or ingot thus produced; therefore,

\Vhat I claim as of my invention, is

l. .Partially purifying and partially converting, and intensely heating molten cast-ironfwhile it is subdilvided into small particles or globules, prior to the mixing of the same with 'a metallic oxide, for the purpose i of forming a-concr`ete bloom or ingot by a single operation, as herein described.

2. The tubes or pipes A B, 'block O, blast-pipes f,

chutes c, and receiving-vessel D, in combination with bloom or ingot-moulds, the whole 'operating substan-` tially as herein described and for the purpose set forth. vVitnesses: y DAVID STEVVARM Geo. H. THOMAS, Unas. HADAWAY. 

